Finding the Third Proportional to 378,942 and 817,984.50

Step by Step Solution

1. Step 1: Write the proportion equation
   378,942 : 817,984.50 = 817,984.50 : x
2. Step 2: Convert to fraction form
   378,942/817,984.50 = 817,984.50/x
3. Step 3: Cross multiply
   378,942x = 817,984.50 × 817,984.50
4. Step 4: Simplify right side
   378,942x = 669,098,642,240.25
5. Step 5: Solve for x
   x = 669,098,642,240.25/378,942
6. Step 6: Final answer
   x = 1,765,701.99